Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ef9e9d55e41663de34ab4ed4108f61b9e1b585d12507037bdbb1b5d5d125ffd' 
  AND token = 'kgE5qWERH05puja0C4C6s8csrTV9lA983zB0CVwXMx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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