SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06c7b9cf5b7b332ffb9642d2cce7c32898b93630d47fd0685f5cfa18627c868c' 
  AND token = 'agKIsEB4gZqOg2KDHGxJomEeL8I4F+E9NblGkB70blI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

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