SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    13468, 13469, 13494, 19171, 13461, 13462, 
    13463, 13464, 13465, 13466, 13467
  )

Query time 0.00065

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 11,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (13468,13469,13494,19171,13461,13462,13463,13464,13465,13466,13467)"
        }
      }
    ]
  }
}