elementor library

// WP_Query arguments
$args = array(
	'post_type'              => array( 'elementor_library' ),
	'meta_query'             => array(
		'relation' => 'AND',
		array(
			'key'     => '_elementor_template_type',
			'value'   => 'header',
			'compare' => '=',
		),
		array(
			'key'     => '_elementor_conditions',
			'compare' => 'NOT REGEXP',
		),
	),
);

// The Query
$query = new WP_Query( $args );