Query about htaccess, friendly url, 301 and seo

I have a website that has not yet been indexed by any robot (example: google) that is, it is completely new and in the htaccess file I did it with a friendly url.

Now my question: I will have to make a redirect 301 anyway to the friendly url as I indicate below, or to be completely a new site is not necessary since the search engine will find the friendly URL the first time.

#configurar de modo amigable
Options +FollowSymLinks
RewriteEngine On
Rewriterule ^productos/([a-zA-Z0-9_-]+).php$ /productos.php?id=$1 [R=301,L]