WordPress : Load custom posts using their custom fields

mycustom-archive.php

//WordPress Query to load custom posts using their custom fields
$myquery = new WP_Query(array(
     'post_type' => 'mycustom', 
     'posts_per_page' => 15,
     'orderby' => 'meta_value',
     'meta_key'=>'mycustom_date_start',
     'order' => 'ASC',
     'meta_query'=>array(
            'relation'=>'AND',
            array(
                'key' => 'mycustom_date_start',
                'value' => date('Y-m-d'),
                'compare' => '>=',
                'type' => 'DATE'
            )
        )
    )
);