SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    18903, 22288, 18906, 22289, 18909, 22280, 
    22281, 22282, 22283, 22284, 22285, 
    22286, 18902, 22287
  )

Query time 0.00062

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": 14,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (18903,22288,18906,22289,18909,22280,22281,22282,22283,22284,22285,22286,18902,22287)"
        }
      }
    ]
  }
}