UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'MzK7sMN74sKUjnaC4TFfZ4BC40GHwj40/F6oeMoE+YE=' 
WHERE 
  key_id = '847e83272ec8ec5633296fedcd447bb6cd261330f1491aaf4020a5dcbb9c8486' 
  AND (
    token = 'MzK7sMN74sKUjnaC4TFfZ4BC40GHwj40/F6oeMoE+YE=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )