[5.2] Use Carbon for everything time related in DatabaseTokenReposito…

…ry (#13234)

* Use Carbon for everything time related

Fixes timezone issues where my token had been expired for an hour already as soon as they were issued.
App timezone was CET and token expiry set to 60 minutes.

* Use $expiresAt->isPast()

Thanks for advice @acasar

src/Illuminate/Auth/Passwords/DatabaseTokenRepository.php

@@ -123,19 +123,9 @@ public function exists(CanResetPasswordContract $user, $token)
      */
     protected function tokenExpired($token)
     {
-        $expirationTime = strtotime($token['created_at']) + $this->expires;
+        $expiresAt = Carbon::parse($token['created_at'])->addSeconds($this->expires);
 
-        return $expirationTime < $this->getCurrentTime();
-    }
-
-    /**
-     * Get the current UNIX timestamp.
-     *
-     * @return int
-     */
-    protected function getCurrentTime()
-    {
-        return time();
+        return $expiresAt->isPast();
     }
 
     /**