Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1851cbdbdc6b41c4cd650e4b530c35a9fca1c56dff2fa364aafd75994b9e4a45' 
  AND token = 'HFGn7XjgxP9jlOlMpiUoOGInCwaCwDhu33S/AWfkvJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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