Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55108918c1963e309f809050ea1b82e90e4438531c3d8d2e2e6ccb3f21016f4c' 
  AND token = 'JZJC9YhzTQRVRgijoc6LMAfEK0ZpcQUhKlOYIOYgan8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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