Time out 300% cpu sql

Please can someone help me fix this? I don't have thousands of visits, my server is strong but it only increases the visits a little and it is impossible to work. Please, I'm not an expert but I understand... I don't understand why the queries generate so much cpu usage... please help

What is the web application you are using that connects to the DB? A PHP script?
You probably need to do some MySQL tuning:
https://www.linode.com/docs/guides/how-to-optimize-mysql-performance-using-mysqltuner/