Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a300af9f106d09e7020f53fa139a1bcf1ef5681e2ebc3e09b0ed299b65d586e' 
  AND token = 'niTRCvk9IsIUGrVwrNicAMnOxK+J8S8JfpfCs7xjwNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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