SELECT 
  product_descriptions.product_id, 
  product_descriptions.short_description, 
  IF(
    product_descriptions.short_description = '' 
    OR product_descriptions.short_description IS NULL, 
    product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  product_descriptions 
WHERE 
  product_descriptions.product_id IN (
    179468, 201561, 242735, 179462, 226873, 
    179472, 206110, 189151, 240141, 225617, 
    179467, 179476, 179478, 179480, 179477, 
    196207, 179475, 196199, 196184, 206107, 
    179479, 196216, 196193, 196183
  ) 
  AND product_descriptions.lang_code = 'en'

Query time 0.01277

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "20.47"
    },
    "table": {
      "table_name": "product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "11",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "18.07",
        "eval_cost": "2.40",
        "prefix_cost": "20.47",
        "data_read_per_join": "122K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`goimagine`.`product_descriptions`.`product_id` in (179468,201561,242735,179462,226873,179472,206110,189151,240141,225617,179467,179476,179478,179480,179477,196207,179475,196199,196184,206107,179479,196216,196193,196183)) and (`goimagine`.`product_descriptions`.`lang_code` = 'en'))"
    }
  }
}