Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e9dc04c85b978a4110e061183079c413468050b91cd96bb29944ca71e4716d' 
  AND token = 'nn94UhHd2oy9wQb/ckXd9IGbt/GzQhh3MZrzacnzdr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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