SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f272e2e850d233e699b532033a8a79d2dbabdb6204893d2141a56d466fd1fa' 
  AND token = 'bKQciArIdqG+CvLDBNwbVvjUrSjBzqbtNWWHZKf9yJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

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