Uhrzeitrahmen 2

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'teststartzeit',
		'value'   => '$current_time',
		'compare' => '<=',
	),
	array(
		'key'     => 'testendzeit',
		'value'   => '$current_time',
		'compare' => '>=',
	),
);