public function index() 
    {  
        DB::beginTransaction();
            $key = Key::lockForUpdate()->where('status' , "1")->where('game_id' , 1)->count();
            sleep(5);
        DB::commit();
        return $key;
    }
    public function index2() 
    {   DB::beginTransaction();
            $key = Key::lockForUpdate()->where('status' , "1")->where('game_id' , 1)->count();
        DB::commit();
        return $key;
    }