SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d00c0f0de7f759114bc7fdb15a95fc1b77872585b0307b71083cf5f6e0378e' 
  AND token = 'aw92NNK3ZUij7HE0+96OfxQBdFPt7LGpTPoNGejbF6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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