SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aedc4f4047a5e2da872dbfb3ef840f564ebd12a6718aa82799f8830bfee9f0d' 
  AND token = 'hMlAVupGjlED7mJKVes05CNxo/mlp7Zt1+H9TQNU++M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

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