Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '225e495023a9160f215b3bb8d4bce70f369fa5c88a15e0004e138704b7eb5ae4' 
  AND token = 'r/Q5hXzm+TQKTPQx0MRf87uaviHCvCAloIzxIqO1sUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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