Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb25fa85a313935f6e36d338d484a0520e3309956cfd4f7c771a2f1d251022f4' 
  AND token = 'tiZIEaCDlrOQ+mD4X68Ye2JP8sNL55Hjyek30GPDLfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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