SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    11509, 13776, 11511, 11521, 11527, 11489, 
    11524, 11497, 11510, 13775, 11515, 
    13772, 11486, 11487, 11520, 11503, 
    13781, 11548, 11547, 11549, 11573, 
    11493, 11490, 11512
  )

Query time 0.00041

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": 24,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (11509,13776,11511,11521,11527,11489,11524,11497,11510,13775,11515,13772,11486,11487,11520,11503,13781,11548,11547,11549,11573,11493,11490,11512)"
    }
  }
}