Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c4d7c86603983c09036bf87dc898f5b1093a897343d60552fcc165d33b24ff5' 
  AND token = 'fDhFzU1GBYByPD3Ywpn3qacUQaMV0YR01FkbhapxXHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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