go to admin/languages
and search this
You requested to reset your password
copy and paste this code into the thml password mail
<p>
Dear {$username},<br />
You requested to reset your password.<br />
Follow this link <a href="{$resetUrl}">passwordreset</a> to change your password.</p>
<p>
If the link doesn't work, please copy and paste this code into your browser.<br />
{$requestUrl}<br />
Then enter this code.<br />
{$code}<br />
If you didn't request password reset, please ignore this email.<br />
<br />
Thank you, {$site_name}</p>
now to get the code to work go to
ow_system_plugins/base/bol/user_reset_password_dao.php
At the end of the php file change this
$example->andFieldGreaterThan(self::EXPIRATION_TS, time());
to this
$example->andFieldGreaterThan(self::EXPIRATION_TS, time() + 3600);
the 3600 = 3600 seconds which = 1 hour
so in 1 hour the code will expire, change to more if needed