Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f8b4ec72ccad53fb43b39511e294869356ddcfc4c43f57eb82bd02a32d592bf' 
  AND token = '/E1nWeetKtKRYC13x/Xewy48N001KyPhsIhR6d7o6zU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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