Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d27c63ddb10b1e8807292cf1b2417a71830f11acb35d06913d287a81d2fdfe9' 
  AND token = '0rD2axQBJ37eciK2quOYDxVcMqiBAM7ji/NAqq4eiDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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