title: mysql boolean on where clause
body: <p>I am wondering which is faster?</p>
  
  <pre><code>SELECT * FROM `table` WHERE `is_deleted` = false;
  </code></pre>
  
  <p>or</p>
  
  <pre><code>SELECT * FROM `table` WHERE NOT `is_deleted`
  </code></pre>
  
  <p>Thank you</p>