SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    621057, 600081, 621042, 600012, 621062, 
    621081, 620876, 621013, 620902, 621045, 
    620921, 600132, 600266, 621063, 600044, 
    600115, 600052, 621082, 621066, 600112, 
    600228, 621019, 600286, 599887, 600223, 
    600204, 620995, 621108, 621067, 620999, 
    621079, 600084, 599947, 620996, 620984, 
    621078, 620997, 620904
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ro'

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.90"
    },
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "ref",
      "possible_keys": [
        "PRIMARY",
        "product_id",
        "company_id"
      ],
      "key": "company_id",
      "used_key_parts": [
        "company_id"
      ],
      "key_length": "4",
      "ref": [
        "const"
      ],
      "rows_examined_per_scan": 4,
      "rows_produced_per_join": 0,
      "filtered": "14.29",
      "cost_info": {
        "read_cost": "0.50",
        "eval_cost": "0.06",
        "prefix_cost": "0.90",
        "data_read_per_join": "2K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "company_id",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ],
      "attached_condition": "((`maniamall_cscart`.`cscart_ult_product_descriptions`.`product_id` in (621057,600081,621042,600012,621062,621081,620876,621013,620902,621045,620921,600132,600266,621063,600044,600115,600052,621082,621066,600112,600228,621019,600286,599887,600223,600204,620995,621108,621067,620999,621079,600084,599947,620996,620984,621078,620997,620904)) and (`maniamall_cscart`.`cscart_ult_product_descriptions`.`lang_code` = 'ro'))"
    }
  }
}