Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ae0352aa9c5cef8e8f7d3fd93777966adb4cf62d97c848506eb35c7a1a89f8b' 
  AND token = 'bmu0jeLXZOtkdlZuVx903npkk7vYs1NYBdjxxe+LxuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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