Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8462753e8a5d91de9e0ab406cb0731cc172cf56a3318e6825b5d53902aa82cc9' 
  AND token = 'Ao1rlUW5k8o64yKg2QBJEtQ9dWUhQEwwM4wwWK9UYg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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