Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8ad03d5981d34a272a60085fedc1f131755279cd64ed4ae8f7a136821ec5b9e' 
  AND token = 'T27EjTVY+8CXJ6Tg6wdWotoGjREz3MpxrgaOMZVv7cI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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