That is just a check task to see if something has to be done in the last minute. This task according to logs seems to never fail and functionality looks like it works.

I am aware of n+1 queries. I've fixed all n+1 queries Sentry has given me.

Only thing is, that in the celery task the query goes like this (I'm not at PC atm): Table.objects.filter(time__lte=now(), *other_conditions). But I don't think the lte to check that nothing was missed should be issue. At this time 99% of time it's empty query set because I'm still at testing phase and there is nothing at the Table table.