SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e33e7a776137665c259826bbfe9341f6c90221a3616109766bc112591278df90' 
  AND token = 'YB3Oqa4gTom+dJTYoYIMz6A5K81q37VDBIfwwn4kWEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables