Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfd860ed467f31763b60fd71359affdad713d2a50143b7f805b70fa81072010a' 
  AND token = 'Q+lBwLhlRSlf4zEFebdtMr1xXeo2PgZTJoeBIAnIB1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}