Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd60e6346898478539d85ea83e1be80581511ccdc2f071c95105c1755148df4d2' 
  AND token = '/BHL2DRcq+X5Zd6BKmbEg4iiSPiBjcLd+LkfunGTfeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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