SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    12552, 10294, 10297, 10302, 10314, 10319, 
    10293, 10296, 10301, 10313, 10318, 
    12565, 10342, 10341, 10368, 10340, 
    10367, 10339, 10366, 10338
  )

Query time 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 20,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (12552,10294,10297,10302,10314,10319,10293,10296,10301,10313,10318,12565,10342,10341,10368,10340,10367,10339,10366,10338)"
    }
  }
}