Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6072a8890af467b8794694e2fed1e71d58470aaec3d6a219f17f49a847f49b6a' 
  AND token = 'PqeN3OnAT+3yREEACsZxm+Evtv/u0bMzA/coYcKYANc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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