UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 300, 
  token = 'n2AxFVNXS3f7LO+zOVaoSrUawIN89zVbTa8zoGw+C4w=' 
WHERE 
  key_id = '21ac80a4531fdb10c541880204d6edfec23d8b9f764858e2f1b9e9cbc75c17b1' 
  AND (
    token = 'n2AxFVNXS3f7LO+zOVaoSrUawIN89zVbTa8zoGw+C4w=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )