Optimize mysql query SELECT with single shop

[Prestadget]

I can see query like this :

 

SELECT `id_connections` FROM `ps_connections` WHERE ip_address = 1123634193 AND DATE_ADD(`date_add`, INTERVAL 30 MINUTE) > '2014-01-19 18:11:00' AND id_shop IN (1) ORDER BY `date_add` DESC LIMIT 1

 

I have 1 shop, so I guess its useless to append "AND id_shop IN(1)" all the time (I mean to improve my mysql performance a bit)?

 

(Also index is missing for the column ps_connections.ip_address, and ip_address should be a UNSIGNED INT.