Don't explain queries by default

config/debugbar.php

@@ -136,7 +136,7 @@ return [
             'backtrace'         => true,   // Use a backtrace to find the origin of the query in your files.
             'timeline'          => false,  // Add the queries to the timeline
             'explain' => [                 // Show EXPLAIN output on queries
-                'enabled' => true,
+                'enabled' => false,
                 'types' => ['SELECT'],     // ['SELECT', 'INSERT', 'UPDATE', 'DELETE']; for MySQL 5.6.3+
             ],
             'hints'             => true,    // Show hints for common mistakes