Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42ce7e0bb14075d01a76dd775c995c1e8af35451d2db9a9d0e52d4110d236785' 
  AND token = 'kEdto7YhG7TlRUMvXQ3acpfWyWwh10Oovw9zuTCUJpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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