Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1158f9cbd119b5c539cb55c967253dc4942673d12a43a6437a555525cd0ab678' 
  AND token = 'TFUA+YC44xv5QgGfoMTSMymwIreCTL+wFwiIcyFNiG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}