get_usable_keys() is empty

[mathijsfr]

Describe the bug
When trying to validate my api key, get_usable_keys() returns empty. This results in not being able to validate my api key.

To Reproduce

1. Having existing api keys in my database according to the following model:

class UserAPIKey(AbstractAPIKey):
    user = models.ForeignKey(
        User,
        on_delete=models.CASCADE,
        related_name="api_keys",
    )

    subscription = models.ForeignKey(Subscription, on_delete=models.CASCADE)

2. Send request with to api with permission_classes = (HasAPIKey, )

class ProductSales(generics.RetrieveAPIView):
    permission_classes = (HasAPIKey, )

    def get(self, request, *args, **kwargs):
       result = 'test'
       return Response(result)

3. Adding print in get_from_key function prints empty query set:

djangorestframework-api-key/src/rest_framework_api_key/models.py

Line 43 in a9579e3

def get_from_key(self, key: str) -> "AbstractAPIKey":

def get_from_key(self, key: str) -> "AbstractAPIKey":
       prefix, _, _ = key.partition(".")
       queryset = self.get_usable_keys()
       print('test', queryset)

       try:
           api_key = queryset.get(prefix=prefix)
       except self.model.DoesNotExist:
           raise  # For the sake of being explicit.

       if not api_key.is_valid(key):
           raise self.model.DoesNotExist("Key is not valid.")
       else:
           return api_key

Expected behavior
Expected to have usable keys to validate my api key

Looks like the usable api keys are requested from rest_framework_api_key_apikey table, instead of the UserApiKey table. How do I solve this?

Desktop (please complete the following information):

• OS: Windows 10 Pro
• Python Version: 3.9.2
• Django Version: 3.2
• DRF Version: 3.12.4