Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '758aa3e1c589de8bf81a80c503163c34e8f47c0631b70a9fd36aeb0882629ff8' 
  AND token = 'gRfV7MCK6pFtuO1Enj0wy9Fum+7QpkIhJ6VT4FuXeA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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