Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50e95801473c4e3b31b79c95faa70a2919198b0dfb3d65fecb0c2c48d3ea2989' 
  AND token = 'JDADpzHpMeLX79phc2P/fWB2B5OrPhzhx/z0hgTf5lM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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