Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3aa4e74fe7499f7d43977e8a88aa5ec5127e76965b69ae02ded3565afb93dbb8' 
  AND token = 'CRG+lfC+uBy76jFu66q/HGovA/Ok+PaQbhbFGiLzA2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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