WordPress - Query posts with taxonomy term (NOT EXISTS) and meta value (DATE)

wp-query-tax-meta.php

<?php
$args = [
	'post_type'      => 'events',
	'posts_per_page' => -1,
	'post_status'    => 'publish',
	'tax_query' => [
		[
			'taxonomy' => 'event_terms',
			'field'    => 'slug',
			'terms'    => 'event_past',
			'operator' => 'NOT EXISTS',
		]
	],
	'meta_key'       => 'events_date',
	'meta_query'     => [
		[
			'key'     => 'events_date',
			'compare' => '<',
			'value'   => date( 'Ymd' ),
			'type'    => 'DATE'
		]
	]
];
$posts = new WP_Query( $args );