Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d77182b9f0ad58d2e6a21e0ef01ab6347d493d725a5e2064ab3f80ce492874a' 
  AND token = 'Ewa8lz6SNbujVflxOClzI7ZmDzddt5slDYGaYMXu/rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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