SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    128, 51118, 51117, 51116, 51115, 51114, 
    51113, 49, 51132, 51131, 51134, 51133, 
    51130, 41, 51155, 51154, 51153, 51152, 
    21, 51169, 51168, 51167, 51166, 90, 
    51171, 51170, 51183, 20, 51188, 51187, 
    51186, 51185, 51184, 51243, 51242, 
    51241, 51240, 51239, 36, 51294, 51293, 
    51291, 51290, 94, 18, 81, 51318, 51317, 
    51316, 51, 51319, 106, 58, 86, 15, 95, 
    51356, 51355, 44, 31, 51366, 51367, 
    51368, 51369
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00100

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "44.81"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 64,
      "rows_produced_per_join": 64,
      "filtered": "100.00",
      "index_condition": "((`test_uchur_k`.`cscart_product_descriptions`.`product_id` in (128,51118,51117,51116,51115,51114,51113,49,51132,51131,51134,51133,51130,41,51155,51154,51153,51152,21,51169,51168,51167,51166,90,51171,51170,51183,20,51188,51187,51186,51185,51184,51243,51242,51241,51240,51239,36,51294,51293,51291,51290,94,18,81,51318,51317,51316,51,51319,106,58,86,15,95,51356,51355,44,31,51366,51367,51368,51369)) and (`test_uchur_k`.`cscart_product_descriptions`.`lang_code` = 'ru'))",
      "cost_info": {
        "read_cost": "38.41",
        "eval_cost": "6.40",
        "prefix_cost": "44.81",
        "data_read_per_join": "292K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}