fix 'exipres' not working normal as expected

related issuses: 240

django_celery_beat/schedulers.py

@@ -119,6 +119,15 @@ def is_due(self):
                 )
                 return schedules.schedstate(False, delay)
 
+        # EXPIRED TASK: Disable task when expired
+        if self.model.expires is not None:
+            now = self._default_now()
+            if getattr(settings, 'DJANGO_CELERY_BEAT_TZ_AWARE', True):
+                now = maybe_make_aware(self._default_now())
+
+            if now >= self.model.expires:
+                self._disable(self.model)
+
         # ONE OFF TASK: Disable one off tasks after they've ran once
         if self.model.one_off and self.model.enabled \
                 and self.model.total_run_count > 0: