Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e39ce23fb0c378f5a58e78cbf49b28e73c30f65be3f52f43d70c2ce8233ab6b' 
  AND token = '2X3HDGs1Znmf40jd89y1wkWVEI89BtRWbhiIQx6S9W4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}