SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e37b59962a3584dc68b75a1da0ed40b6c3dbb6235eae59d465c96ea74f13dbf' 
  AND token = 'Z3FfqzwV9wqrVxQ91VQfWFSv+IVuIEGBWACggslK6y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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