Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abdb3a9215b8e9ba97ad4f7e26bfb7e3dbb18532b2ef2538885051377a0d348f' 
  AND token = 'F/nD7Z6f9sPwj9/IIazlHMZhNW13QXQTi+0i67aXdZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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