and

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'produkttyp',
		'value'   => '127',
		'compare' => 'LIKE',
	),
	array(
		'key'     => 'archivaktiviert',
		'value'   => '"ja"',
		'compare' => 'NOT LIKE',
	),
	array(
		'key'     => 'farbschema-farbe-1',
		'value'   => 'ffffff',
		'compare' => 'LIKE',
	),
);