Slow down WordPress : SELECT DISTINCT meta_key FROM wp_postmeta WHERE meta_key NOT BETWEEN ‘_’ AND ‘_z’ HAVING meta_key NOT LIKE ‘\\_%’ ORDER BY meta_key LIMIT 30

I have fetch some issue when many records exist in post meta, so below query i found into Query Monitor WordPress plugin that was taking too much time to execute

SELECT DISTINCT meta_key FROM wp_postmeta WHERE meta_key NOT BETWEEN ‘‘ AND ‘_z’ HAVING meta_key NOT LIKE ‘\%’ ORDER BY meta_key LIMIT 30

That query is locatated at ../wp-admin/includes/template.php Line no 682

So what I did as I do not need meta form with selection option I have added below filter on my function.php and going to rocket my client website:

add_filter(‘postmeta_form_keys’, function(){
return false;
});

Try to do you as well and let me know if you having same issue and solve by above filter. thanks