Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '421191804c25ed52d896fcddf39869a24348da86171556e1419661aba4205916' 
  AND token = 'm3RE0FLvr/yDFKRa5nRCXhGZUzqAuEm8zPCFYlzePvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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