UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Rk6g5rnBchF79KPlgobNTqaCumGPnCP7UTRqHOoADNI=' 
WHERE 
  key_id = '8b635db92e1afaa30495ae462ee156bc919d3d5ba682b9117e8f31c44e83cd62' 
  AND (
    token = 'Rk6g5rnBchF79KPlgobNTqaCumGPnCP7UTRqHOoADNI=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )