SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10431, 10430, 10429, 10428, 10427, 10426, 
    10425, 12564, 10424, 10423, 10422, 
    10421, 10420, 10419, 10418, 10417, 
    12856, 10416, 10415, 10414
  )

Query time 0.00044

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 (10431,10430,10429,10428,10427,10426,10425,12564,10424,10423,10422,10421,10420,10419,10418,10417,12856,10416,10415,10414)"
    }
  }
}