Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '598b6da80d683c9acc3d014befdc8bb825ba7cceae9da45c5219e48b517eaf05' 
  AND token = 'zhmY2Gh++CYG5PfY1gpZgeSXHiDvCAVNh6331T2p89A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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