SELECT 
  cscart_products.*, 
  cscart_products.ebay_status, 
  cscart_products.ebay_template_id 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    23023, 23024, 23025, 23026, 23027, 23028, 
    23029, 23030, 23031, 23032, 23033, 
    23034, 23035, 23036, 23037, 23038
  )

Query time 0.00032

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": 16,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (23023,23024,23025,23026,23027,23028,23029,23030,23031,23032,23033,23034,23035,23036,23037,23038)"
    }
  }
}