Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '123fe258b658958924169c187074d6ed053903acf981729b2e329d0cb2e45570' 
  AND token = 'KRLaOWRq/DnDHpxAI9GSMnDhdpsInxP1uND0JJszAb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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