SELECT 
  company_descriptions.*, 
  companies.*, 
  vendor_plan_descriptions.plan, 
  seo_names.name as seo_name, 
  seo_names.path as seo_path, 
  vendor_ga_tracking_code, 
  vendor_fb_tracking_code, 
  AVG(discussion_rating.rating_value) AS average_rating, 
  CONCAT(
    companies.company_id, 
    '_', 
    IF (
      discussion_rating.thread_id, discussion_rating.thread_id, 
      '0'
    )
  ) AS company_thread_ids 
FROM 
  companies AS companies 
  LEFT JOIN company_descriptions AS company_descriptions ON company_descriptions.company_id = companies.company_id 
  AND company_descriptions.lang_code = 'en' 
  LEFT JOIN vendor_plan_descriptions ON companies.plan_id = vendor_plan_descriptions.plan_id 
  AND vendor_plan_descriptions.lang_code = 'en' 
  LEFT JOIN seo_names ON seo_names.object_id = 1739 
  AND seo_names.type = 'm' 
  AND seo_names.dispatch = '' 
  AND seo_names.lang_code = 'en' 
  LEFT JOIN discussion as discussionA ON discussionA.object_id = companies.company_id 
  AND discussionA.object_type = 'M' 
  LEFT JOIN discussion_posts ON discussion_posts.thread_id = discussionA.thread_id 
  AND discussion_posts.status = 'A' 
  LEFT JOIN discussion_rating ON discussionA.thread_id = discussion_rating.thread_id 
  AND discussion_rating.post_id = discussion_posts.post_id 
WHERE 
  companies.company_id = 1739

Query time 0.00098

JSON explain

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    "nested_loop": [
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            "city",
            "state",
            "country",
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            "email",
            "phone",
            "url",
            "storefront",
            "secure_storefront",
            "entry_page",
            "redirect_customer",
            "countries_list",
            "timestamp",
            "shippings",
            "logos",
            "request_user_id",
            "request_account_name",
            "request_account_data",
            "plan_id",
            "stripe_connect_account_id",
            "identifier_facebook_pixel",
            "featured_products",
            "sd_ga_tracking_code",
            "paypal_commerce_platform_account_id",
            "tagline",
            "url_facebook",
            "url_instagram",
            "url_twitter",
            "url_pinterest",
            "announcement",
            "shippo_api_token",
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            "custom_domain",
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            "taxjar_export_statuses",
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            "ag_hide_city",
            "updated_timestamp",
            "suspend_date",
            "grace_period_start",
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            "tax_number",
            "stripe_connect_account_type",
            "registered_from_storefront_id"
          ]
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          },
          "used_columns": [
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            "company_description",
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            "subdomain_colors",
            "i18n_company",
            "i18n_address",
            "i18n_city"
          ]
        }
      },
      {
        "table": {
          "table_name": "vendor_plan_descriptions",
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          },
          "used_columns": [
            "plan_id",
            "lang_code",
            "plan"
          ]
        }
      },
      {
        "table": {
          "table_name": "seo_names",
          "access_type": "ref",
          "possible_keys": [
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          ],
          "key": "PRIMARY",
          "used_key_parts": [
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          ],
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          "cost_info": {
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          },
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            "path",
            "lang_code"
          ]
        }
      },
      {
        "table": {
          "table_name": "discussionA",
          "access_type": "const",
          "possible_keys": [
            "object_id"
          ],
          "key": "object_id",
          "used_key_parts": [
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            "object_type"
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      {
        "table": {
          "table_name": "discussion_posts",
          "access_type": "ref",
          "possible_keys": [
            "thread_id",
            "thread_id_2"
          ],
          "key": "thread_id_2",
          "used_key_parts": [
            "thread_id",
            "status"
          ],
          "key_length": "6",
          "ref": [
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          },
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            "post_id",
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            "status"
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      },
      {
        "table": {
          "table_name": "discussion_rating",
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            "thread_id"
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          "used_columns": [
            "rating_value",
            "post_id",
            "thread_id"
          ],
          "attached_condition": "<if>(is_not_null_compl(discussion_rating), (`goimagine`.`discussion_rating`.`thread_id` = `goimagine`.`discussionA`.`thread_id`), true)"
        }
      }
    ]
  }
}

Result

company_id lang_code company_description terms subdomain_colors i18n_company i18n_address i18n_city status company address city state country zipcode email phone url storefront secure_storefront entry_page redirect_customer countries_list timestamp shippings logos request_user_id request_account_name request_account_data plan_id stripe_connect_account_id identifier_facebook_pixel featured_products sd_ga_tracking_code paypal_commerce_platform_account_id tagline url_facebook url_instagram url_twitter url_pinterest announcement shippo_api_token shippo_carrier shippo_service_type vendor_ga_tracking_code vendor_fb_tracking_code custom_domain custom_domain_status taxjar_key taxjar_export_statuses taxjar_export_csv_data ag_hide_city updated_timestamp suspend_date grace_period_start last_time_suspended last_debt_notification_time tax_number stripe_connect_account_type registered_from_storefront_id plan seo_name seo_path average_rating company_thread_ids
1739 en <p>Born and raised in Tennessee - I learned a of love crafting from my Granny, who was a well known crafter of all types. She taught me to sew, cook, can, garden and so much more.&nbsp; There was nothing she couldn't do and I&nbsp;aspire to be just as wonderful as she was.&nbsp;&nbsp;</p> <p>This shop is my creative outlet from my full time job in technology.&nbsp; I&nbsp;love to create custom products for my clients, so if I&nbsp;can help you design something, I&nbsp;would love that. Most of what you'll find in my shop was a custom creation for one of my customers!&nbsp;</p> <p>My primary crafting medium is sublimation.&nbsp; In that process I&nbsp;create a custom digital design which is printed on speciality paper with submlimation ink and then heat pressed on to your item.&nbsp; When the ink is heated, it creates a gas that becomes a permanent part of material. It can't be washed off, bleached out or otherwise destroyed.</p> <p>I also create some items using vinyl or heat transfer vinyl, allowing me some additional flexiblity with colors.</p> <p>I am married to a great guy and we have 2 awesome boys who make my world turn everyday! My life is big and busy and I love it!&nbsp;</p> <p><br></p> <p>Cancellations accepted if it is prior to your items being completed.&nbsp;</p> <p>I do not accept returns for custom items, any other returns will be accepted if you pay shipping back to me.&nbsp;</p> {"tmenu_style":"H","default_colors":"N","link_color":"#007d89","label_color":"#00a0af","icon_color":"#00a0af","main_btn_color":"#6dd1d6","branded_text_color":"#00a0af","vbp_1_url":"","vbp_2_url":"https:\/\/dibbleedesignco.goimagine.com\/index.php?dispatch=companies.view&company_id=1739","vbp_3_url":"","vba_1_url":"","vba_2_url":"","vba_3_url":""} Dibblee Design Co 9519 Glenfiddich Trace Brentwood A Dibblee Design Co 9519 Glenfiddich Trace Brentwood TN US 37027 dibbleedesignco@gmail.com none Y 1613080897 0 3 acct_1IJqcGCtfUaFBZaM 104413,104540,147727,175850,181328,66639,178013,186184,198965,73735,65520 G-TBE99B6RHJ V57PJNZ8C4ZJQ Grandaughter of a maker, continuing the tradition www.facebook.com/dibbleedesign https://www.instagram.com/dibbleedesignco/ <p>Welcome to my shop! Most of my creations are custom, please contact me if you don't find what you are looking for, I'd love to create something for you.</p> G-TBE99B6RHJ 511020813412842 dibbleedesign.com A N 0 0 0 0 0 S Professional Plan dibbleedesignco 1739_0