SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    6230, 6250, 6256, 6258, 6255, 6245, 6251, 
    6257, 6246, 6259, 6260, 6248, 6253, 
    6252, 6247, 6249, 6254
  )

Query time 0.00037

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": 17,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (6230,6250,6256,6258,6255,6245,6251,6257,6246,6259,6260,6248,6253,6252,6247,6249,6254)"
    }
  }
}