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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    10607, 10609, 10610, 10611, 10612, 10613, 
    10614, 10615, 10616, 10617, 10618, 
    10619, 10620, 10621, 10622, 10623, 
    10624
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.00445

JSON explain

{
  "query_block": {
    "select_id": 1,
    "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": 17,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (10607,10609,10610,10611,10612,10613,10614,10615,10616,10617,10618,10619,10620,10621,10622,10623,10624) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}