SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47dae3f7c92102d29aa48091ba0ae6caa2a354d32abc5568ae99c529a229f245' 
  AND token = 'keDQQcQ61lQV/yfoxScqqpHDQJ7/21HPblj5ef2aNFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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