SELECT 
  cscart_products.*, 
  cscart_products.ebay_status, 
  cscart_products.ebay_template_id 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    22543, 22544, 22545, 22546, 22547, 22548, 
    22549, 22550, 22551, 22552, 22553, 
    22554, 22555, 22556, 22557, 22558
  )

Query time 0.00048

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 (22543,22544,22545,22546,22547,22548,22549,22550,22551,22552,22553,22554,22555,22556,22557,22558)"
    }
  }
}