SELECT 
  * 
FROM 
  companies AS com 
  LEFT JOIN products AS prod ON com.company_id = prod.company_id 
WHERE 
  prod.product_id = 274782

Query time 0.00086

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "prod",
          "access_type": "const",
          "possible_keys": [
            "PRIMARY",
            "idx_company_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "ref": [
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.00",
            "eval_cost": "0.10",
            "prefix_cost": "0.00",
            "data_read_per_join": "4K"
          },
          "used_columns": [
            "product_id",
            "product_code",
            "product_type",
            "status",
            "company_id",
            "list_price",
            "amount",
            "weight",
            "length",
            "width",
            "height",
            "shipping_freight",
            "low_avail_limit",
            "timestamp",
            "updated_timestamp",
            "usergroup_ids",
            "is_edp",
            "edp_shipping",
            "unlimited_download",
            "tracking",
            "free_shipping",
            "zero_price_action",
            "is_pbp",
            "is_op",
            "is_oper",
            "is_returnable",
            "return_period",
            "avail_since",
            "out_of_stock_actions",
            "localization",
            "min_qty",
            "max_qty",
            "qty_step",
            "list_qty_count",
            "tax_ids",
            "age_verification",
            "age_limit",
            "options_type",
            "exceptions_type",
            "details_layout",
            "shipping_params",
            "weight_lbs",
            "weight_oz",
            "product_tax_code",
            "deleted_at",
            "archived_at",
            "position"
          ]
        }
      },
      {
        "table": {
          "table_name": "com",
          "access_type": "const",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "company_id"
          ],
          "key_length": "4",
          "ref": [
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.00",
            "eval_cost": "0.10",
            "prefix_cost": "0.00",
            "data_read_per_join": "14K"
          },
          "used_columns": [
            "company_id",
            "status",
            "company",
            "lang_code",
            "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"
          ]
        }
      }
    ]
  }
}

Result

company_id status company lang_code 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 product_id product_code product_type list_price amount weight length width height shipping_freight low_avail_limit usergroup_ids is_edp edp_shipping unlimited_download tracking free_shipping zero_price_action is_pbp is_op is_oper is_returnable return_period avail_since out_of_stock_actions localization min_qty max_qty qty_step list_qty_count tax_ids age_verification age_limit options_type exceptions_type details_layout shipping_params weight_lbs weight_oz product_tax_code deleted_at archived_at position
756 A Lindas Jewelry Shop en 415 Tri City Road Somersworth NH US 03878 tibs@comcast.net none Y 1673889985 0 a:4:{s:14:"company_fields";a:2:{i:37;s:5:"Linda";i:38;s:9:"Thibodeau";}s:15:"admin_firstname";s:5:"Linda";s:14:"admin_lastname";s:9:"Thibodeau";s:6:"fields";a:0:{}} 3 acct_1CS4tdANpj54WHMU 185108,246281,225772,232484,67803,246151 Handmade Gemstone Jewelry and Gifts facebook.com/lindasjewelryshop instagram.com/lindasjewelryshop <p><span style="color: rgb(38, 38, 38);"></span></p> <p>Welcome to Linda's Jewelry Shop! Check out our New Arrivals section for all our newest items. For FREE gift wrapping, just enter GIVEITAWRAP in the notes section at checkout. FREE SHIPPING on all orders $35 and over.</p> <p></p> <p><i></i></p> <p><br></p> lindasjewelryshop.com A {"items_per_file":"2500","time_from":"","time_to":""} N 1673905570 0 0 0 0 S 274782 GI-274782-BRW P 0.00 7 4.059 0 0 0 0.00 0 0 N N N B Y R N N N Y 10 0 N 0 0 0 0 N 0 P F a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0.000 64.950 2147483647