Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4d8516c246083e239fe993ebec5d8e7ab7486d50351d5bd7fb51cfda54b37c7' 
  AND token = 'Umwl++bD/+heV62ng2EkifZrsFXoNRqyIScdHQg48kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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