itsclarke

$args = array(
            'post_type' => 'kodakalaris_listing',
            'posts_per_page' => 4,
            'orderby' => 'index_clause',
            'meta_query' => array (
                'site_clause' => array (
                    'key' => 'listing_region_slug',
                    'value' => get_microsite_slug() . '-microsite-home-featured'
                ),
                'index_clause' => array (
                    'key' => 'listing_index',
                )
            )
        );

Ended up solving my problem. I found the solution here