Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ce52fb3f8ca55fcd347a0c021a9f207a6103fb77ee670d2fc36e0dcf63974e' 
  AND token = 'qTcb4I90T8Shj/w2nV3oe8lMYFSz7u2dmWOi+Cxq5u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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