SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.short_description, 
  cscart_product_descriptions.full_description, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.page_title, 
  cscart_product_descriptions.promo_text, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    14005, 15746, 16337, 16336, 15745, 14662, 
    13464, 13998, 13933, 14148, 14678, 
    14131, 13465, 18481, 19930, 19598, 
    19599, 19602, 14142, 14138, 14133, 
    14137, 13497, 15734
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00078

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.04252208,
    "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"],
          "loops": 1,
          "rows": 24,
          "cost": 0.04252208,
          "filtered": 100,
          "attached_condition": "cscart_product_descriptions.product_id in (14005,15746,16337,16336,15745,14662,13464,13998,13933,14148,14678,14131,13465,18481,19930,19598,19599,19602,14142,14138,14133,14137,13497,15734) and cscart_product_descriptions.lang_code = 'en'"
        }
      }
    ]
  }
}