Query against one database or two. Who cares?

Question

PHP

Hi all!
There is one database.
For example, it has tables:

1. users: 1000000 entries
   
2. goods: 1000000 records
   
3. etc.
   

And so. When registering, I have an Ajax request when entering each character in the login input for availability in the database-> users.
And for example, in parallel on the site, several more users are looking for something in the database-> products.
Does it make sense to separate those tables across different databases to make queries easier? Or does it make no sense?
Briefly . Will the load become easier with requests to different databases than with the same number of requests to one database?
Thank you!

Answer 1

No, it doesn't. Unless, of course, each of the databases is moved to a separate server. :)