Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fe52cb197313eb75099a4da15e542bb6250f7ea8a85bc23079050625acd7427' 
  AND token = 'LGnUdCWdoXE+10r+xHajgrWuykInEVLgGVU5po+oADU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}