Wordpress - WP_Query Multiple OrderBy Meta_Key

I want to output a list of guides, where each guide has votes and rating. So I want to sort the guide list by rating and votes.

Example:

Guide Name      Rating    Votes
Guide1            10        3
Guide2            10        2
Guide3            10        1
Guide4            9         6
Guide5            9         2

So I have to order the guides by 2 meta_key with are

omvp_vote_rating and omvp_total_vote

I have tried many many ways to get it work, but haven't got it yet. There is one way I almost have it working, but the problem is that I can't get it to order by meta_key, I can only order it by normal field like comment_count, modified, date, rand (random), title ... So here is my code

$args = array(
        'post_type' => 'guides',
        'meta_key' => 'omvp_vote_rating',
        'post_status' => 'publish', 
        'posts_per_page' => 20,
        'meta_query' => array(
            array(
                'key' => 'omvp_vote_rating',
                'compare' => '>=',
                'value' => 0
            ),
            array(
                'key' => 'omvp_total_vote',
                'compare' => '>=',
                'value' => 0
            ),
        ),
        'orderby'    => array(
            'title' => 'ASC', //<- This is working
            'omvp_total_vote' => 'DESC' //<- This is not working
        ),
    );
$wp_query = new WP_Query( $args );

You can do so by custom select query instead.

$query = "SELECT * FROM $wpdb->posts
LEFT JOIN $wpdb->postmeta AS rating ON(
$wpdb->posts.ID = rating.post_id
AND rating.meta_key = 'omvp_vote_rating'
)
LEFT JOIN $wpdb->postmeta AS vote ON(
$wpdb->posts.ID = vote.post_id
AND vote.meta_key = 'omvp_total_vote'
)
WHERE $wpdb->term_taxonomy.term_id = 3

AND $wpdb->posts.post_status = 'publish'
ORDER BY rating.meta_value, vote.meta_value ASC LIMIT 0,20"

$posts = $wpdb->get_results($query, object);