Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06b5358ae07363695d87bda6ff110ad1d958dce251f3fadfbcad9e5461acb7e0' 
  AND token = 'mehGx/WS92dA9KPp6KR3iZm3uTKfqkTq4N7bZROo/d4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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