SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80fe0b1c78489fc0b2a73e9c27117011832befac687b4f78d43329eae012ca11' 
  AND token = 'o95MX6UMYqY5O3oV7TPVXd9sI7GuV6N/qlwYvnJGY6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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