SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fd51d01639be89033cb4fc4c8e877cd767a7651c06ae57d56bb579a133e63fea' 
  AND token = '3WtabjsTJfOKInQi+O4YxZ5b9gCP6qAqpBH869GwKog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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