UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'avbLnBXPdd5Qk26pv3h5Jbhq20RLu+OdN39X6EE0FFY=' 
WHERE 
  key_id = '51e451fb886b70f7adaab29997d46af36f1a682e6617180038d871480f097214' 
  AND (
    token = 'avbLnBXPdd5Qk26pv3h5Jbhq20RLu+OdN39X6EE0FFY=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )