Few, complex OR many, simple MySQL queries?

Im working on a onlineshop with php.

I work with the mvc model and I divide each small part of my application in: model view controller and service ( service is there for the query ).

So for example I would have a Item cart which is divided in discription and price...

For each of them I would have a seperate query, for example the discription: 'SELECT discription OF ... WHERE ...'

So my questin is:

Is there any downside ( like a worse performance ) if I use many simple MySQL queries instead of one complex query?

source https://stackoverflow.com/questions/71585407/few-complex-or-many-simple-mysql-queries