Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '230b28ab5a5553ce99be89107360d428cd833bceb499c9f632755412df17e25c' 
  AND token = 'brWV2h1BD1i+Q3W28BTJnZyIzJt57JMsxu8uC8MX1cI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}