Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98a75fe9ee3d7ffb05c777c88e248e89080c4102ca523731decd29b8d9820cdd' 
  AND token = '2x+dduv2LPpTjUmNaS6qiDief62VWN5dcAXEvuNgkh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}