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 (
    421, 427, 408, 382, 418, 1930, 400, 424, 
    381, 1529, 401, 1465, 428, 415, 391, 
    406, 329, 439, 390, 393, 394, 396, 397, 
    398, 399, 422, 434, 383, 412, 1927, 435, 
    419, 430, 324, 431, 432, 429, 384, 327, 
    395, 420, 385, 405, 410, 413, 417, 1937, 
    414, 425, 407, 323, 389, 402, 388, 426, 
    409, 404, 325, 387, 386, 416, 326, 441, 
    322
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00093

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "6.10"
    },
    "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": 17,
      "rows_produced_per_join": 1,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "2.70",
        "eval_cost": "0.34",
        "prefix_cost": "6.10",
        "data_read_per_join": "6K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "company_id",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ],
      "attached_condition": "((`eshopuga_upgr_4122`.`cscart_ult_product_descriptions`.`product_id` in (421,427,408,382,418,1930,400,424,381,1529,401,1465,428,415,391,406,329,439,390,393,394,396,397,398,399,422,434,383,412,1927,435,419,430,324,431,432,429,384,327,395,420,385,405,410,413,417,1937,414,425,407,323,389,402,388,426,409,404,325,387,386,416,326,441,322)) and (`eshopuga_upgr_4122`.`cscart_ult_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}