Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83aba00789c926d19394a6f0695735ba361aa9886320a2bfb5fcd87d09b920b8' 
  AND token = 'Cnzqh4Wm9mO+Txe4+LqyQOuA3PCCu/a/01X0X9FlUQ0=' 
  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"
    }
  }
}