Slow website due to to many SQL queries

[Valentina R]

My site first slow down and after didn’t response. After upgrading hosting and connecting with a support that said that plug-in bookings appointment slow down site and takes CPU performance. This is what support gives to me
“5875 /nas/content/live/medicante/wp-content/plugins/woocommerce-appointments/includes/data-stores/class-wc-appointment-data-store.php:557”

The number on the left is how many time the plugin has tried to hit MySQL.

More info: hosting is WPEngine, the site only 45 appointments for the top-selling product.

Reported here.