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 (
    22201, 22202, 22238, 22203, 22368, 22204, 
    22205, 22218, 22206, 22207, 22208, 
    22209, 22210, 22211, 22212, 22213, 
    22214, 22215
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00108

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_descriptions",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "product_id"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["product_id", "lang_code"],
          "rows": 18,
          "filtered": 100,
          "index_condition": "cscart_product_descriptions.product_id in (22201,22202,22238,22203,22368,22204,22205,22218,22206,22207,22208,22209,22210,22211,22212,22213,22214,22215) and cscart_product_descriptions.lang_code = 'ru'"
        }
      }
    ]
  }
}