Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6432af42e28e5e6766f3644e14db493ef85a8b337b28d76f821ca329f7d7350' 
  AND token = 'l6RNdEbas1JLSnQsrCJtqVxxeW5tturh9AWPoYSr9yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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