meta_query_start_one

$meta_query_start_one = array(
	'relation' => 'AND',
	array(
		'key'     => 'startdatum_event',
		'value'   => '$today',
		'compare' => '<',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'enddatum_event',
		'compare' => '=',
		'type'    => 'DATE',
	),
);