Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0db993e7d38ef98bb333a0545c831b7d3b5417f1384e918b9c94e7230daba64' 
  AND token = 'rhge3kOsDKMuhSqOK06XMZaI7BnU+5czlBfyorXwe3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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