Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ab69993a372ba49fb380f95d900f1fd475a59eb8699930711d7838a6f30bd74' 
  AND token = 'RdHGVQQlbGQ/+FHnNppfHpspWeJsNIcQtlIwofElyFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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