Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd618b3ef3359070acff5ba95828e0d4d1ea3738f11c00b93bfb9f6f5d6b66c0f' 
  AND token = '1Ob6hjd/aDTw8MYOiZn98fZgE4yaQZkZiqlN2niktnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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