SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f09075453e6c02d6baf0f5117d2c6354e095b7261a3b7b55fbd614949caf452' 
  AND token = 'RwlPW0JGKBdlx8cHTQf3H6TlaMRZnEhY8M80kqz+zOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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