Django ORM query works on shell but time outs in Api View

Question

I have large list of ids and wanted to filter objects using those ids:

list_of_ids = [1, 2, 3, 4, ...]

MyModel.objects.filter(id__in=list_of_ids)[:20]

That query works just fine from shell, but when I try to do the same thing in API View it time outs:

from rest_framework.response import Response
from rest_framework.views import APIView


class MyModelAPIView(APIView):
    def get(self, request):
        ids = [1, 2, 3, 4, 5, ...]
        print(MyModel.objects.filter(id__in=ids)[:20])
        return Response({})
    

After I got the response with a 504 status code, I see in terminal logs what the print function did:

django_1       | <QuerySet [<MyModel: 231>, <MyModel: 268>, <MyModel: 269>, <MyModel: 271>, <MyModel: 272>, <MyModel: 274>, <MyModel: 275>, <MyModel: 277>, <MyModel: 280>, <MyModel: 281>, <MyModel: 282>, <MyModel: 284>, <MyModel: 285>, <MyModel: 288>, <MyModel: 289>, <MyModel: 290>, <MyModel: 291>, <MyModel: 292>, <MyModel: 294>, <MyModel: 298>]>

But I can't find out why do request time outs? I could not find similar problems there

(I understand that problem might be in my large list of ids, but shell executes that query without any problem)