Quick Pagepost redirect plugin optimisation

test.php

<?php

// OLD QUERY, 0.525s:
$finalSQL   = "SELECT * FROM {$wpdb->prefix}postmeta as `m1` WHERE {$whereSQL} m1.post_id IN ( SELECT post_id FROM {$wpdb->prefix}postmeta as `m` WHERE 1 = 1 AND m.meta_key ='_pprredirect_active' AND m.meta_value = '1');";

// NEW query, 0.0007s:
$finalSQL    = "SELECT m1.* FROM {$wpdb->prefix}postmeta as `m1` INNER JOIN {$wpdb->prefix}postmeta as `m` WHERE 1 = 1 AND m.meta_key ='_pprredirect_active' AND m.meta_value = '1' AND m.post_id = m1.post_id";