这样使用悲观锁for update有用吗

DB::beginTransaction();
            try {

                $workorderModel = new Workorder();
                $exists = $workorderModel->where('order_id', $order->id)->where('status', 'action')->forUpdate()->exists();
                if ($exists > 0) {
                    throw new InvalidRequestException('该订单存在未处理工单（收到工单），请先撤销');
                }


                $receiver_user_id = $order->seller_user_id;

                Workorder::create([
                    'order_id'         => $order->id,
                    'task_sn'          => $order->task_sn,
                    'order_status'     => $order->status,
                    'sender_user_id'   => Auth::user()->id,
                    'sender_user_type' => Auth::user()->type,
                    'receiver_user_id' => $receiver_user_id,
                    'enum'         => $request->enum,
                    'description'  => $request->description,
                    'picture'      => $request->picture,
                ]);

                DB::commit();

            }catch (\Exception $e) {
                DB::rollBack();
                throw $e;
            }

之前都是用于->first()里面
这个用于exits不知道会不会等待，没用锁的话，系统卡的时候还是会导致重复提交