Query WordPress Posts by Advanced Custom Fields

acf-query.php

<?php 

// args
$args = array(
	'numberposts'	=> -1,
	'post_type'		=> 'YOUR_POST_TYPE',
	'meta_query'	=> array(
		'relation'		=> 'AND',
		array(
			'key'		=> 'YOUR_ACF_SLUG',
			'value'		=> 'YOUR_ACF_VALUE',
			'compare'	=> 'LIKE'
		)
	)
);


// query
$the_query = new WP_Query( $args );

?>
<?php if( $the_query->have_posts() ): ?>
	<?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
            <h3><?php the_title(); ?> </h3>
            <p><?php the_field('YOUR_ACF_SLUG'); ?></p>
	<?php endwhile; ?>
<?php endif; ?>

<?php wp_reset_query();	 // Restore global post data stomped by the_post(). ?>