Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd046d982c0d665a738b009e9e2f8ddfbfa9b8c7ec4b5267bb736aaa01aae9751' 
  AND token = 'mC87rPdguMcvyp2r3HYZeOucOjyuy+VCBuGEWsV3cP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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