Custom field

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'edudex_feed',
		'value'   => '1',
		'compare' => '=',
	),
	array(
		'key'     => 'zichtbaarheid',
		'value'   => 'P',
		'type'    => 'CHAR',
	),
);