Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6777a1f2ff2081558cafa229dc768186acc36dbdf87d7faf6c7d12f75eab691b' 
  AND token = '1HWRCKOvN7/4iLwCcP7kW0lFjfE8Kf9qAR2RDLO70nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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