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 (
    55, 92, 143, 280, 337, 339, 506, 510, 516, 
    517, 526, 527, 528, 529, 530, 1562, 1563, 
    1564, 1565, 1566, 1567, 1568, 1569, 
    1570, 5477, 5556, 5473, 1843, 1841, 
    1840, 486, 1842
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00145

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 32,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (55,92,143,280,337,339,506,510,516,517,526,527,528,529,530,1562,1563,1564,1565,1566,1567,1568,1569,1570,5477,5556,5473,1843,1841,1840,486,1842) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}