SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd94c2b9f57d7aa9dd449310532e10022efba0ba802d1da1a35dde9bd6055ad9a' 
  AND token = '1N9OKyAZ7ES6I+MR/jDhNJfYheaH+CCSxcJCrkorzbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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