Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5958212a15ce66c94b8955e8a6af9a27bddf690271eb120a1dd04e1bdd49f848' 
  AND token = 'PDcMMPF6e4SSFfKGjoXxjbETVrLgN1KyFTsXp2Y8T0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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