Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '422bf088ed81e33deef817643e7c4eef15eea652f588e34f69652b87952b8a09' 
  AND token = 'NjYRKI3fQHVC2j6u9Tgn+SrznxEaB2tYHWwcJsO9r2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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