Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'e88795a2e5b449e0e6f8f2ce8c2fa07620869493957668098be22050d4da3e24' 
  AND token = 'kabuft20VKagRjKYFIhvWmfavpGuwXwUI/f4vXuMWvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00782

JSON explain

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