Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26affeafbbb61893321e154f1dcf7eb11c415fb38f1e155796fb14bbb6c14efc' 
  AND token = 'RtIttr6/lq6w70j+wbMNZDo1o1rulVmb408bI1zfJ7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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