Get all timezones set within a given time. Uses time_dsc_index

        SELECT *
        FROM <table>
        WHERE time_order <= -<start_timestamp>
        AND time_order >= -<end_timestamp>

        :param args: SQLAlchemy filter criteria, (e.g., uid == uid, type == 1)
        :param kwargs: start_timestamp and end_timestamp are the only kwargs, they specify the range (inclusive)
        :return: model generator

def read_time_range(cls, *args, **kwargs):
        """
        Get all timezones set within a given time. Uses time_dsc_index

        SELECT *
        FROM <table>
        WHERE time_order <= -<start_timestamp>
        AND time_order >= -<end_timestamp>

        :param args: SQLAlchemy filter criteria, (e.g., uid == uid, type == 1)
        :param kwargs: start_timestamp and end_timestamp are the only kwargs, they specify the range (inclusive)
        :return: model generator
        """
        criteria = list(args)
        start = kwargs.get('start_timestamp')
        end = kwargs.get('end_timestamp')
        if start is not None:
            criteria.append(cls.time_order <= -start)
        if end is not None:
            criteria.append(cls.time_order >= -end)
        return cls.read(*criteria)