SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1194f2b3aae854e617510ee83188c0850c9c1b7a484d93412dfdd25c63e2f745' 
  AND token = 'rXjYEgwc6d4/5mpwxlztHwGxjFV5QLCNUEd/J0kAhAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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