reaches connection = connections[DEFAULT_DB_ALIAS] which appears in the traceback above.
at the bottom the traceback, django/db/backends/mysql/base.py fails to import utils from django.db.
This is just weird.
Did you try to contact your hosting provider's technical support? Since it's a shared host, I guess you're using a version of Django installed by them at the system level. You must not be the only one trying to use Django with MySQL.