Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bfc5613b6c7f2acadc0fd7c93416e3788d96a4c36c90a43e53f64ff963d9ca6' 
  AND token = 'WRN+h2YO6GdSaCgKoSC4HMih9K57sk00lqBlinOjQ6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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