UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 300, 
  token = 'erCNRt4IgIpbm6bk7BK4JduvGpUiSGnZZVlJEpuKXnc=' 
WHERE 
  key_id = '6ea9029eb8667a937cab0361c3e932ad1028b7335a5f76af9c14daa864621abd' 
  AND (
    token = 'erCNRt4IgIpbm6bk7BK4JduvGpUiSGnZZVlJEpuKXnc=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )