protected function _timedOut()
    {
        $time = $this->read('Config.time');
        $result = false;

        $checkTime = $time !== null && $this->_lifetime > 0;
        if ($checkTime && (time() - (int)$time > $this->_lifetime)) {
            $result = true;
        }

        $this->write('Config.time', time());

        return $result;
    }