Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b645a69878cd14f9d067a823a6048aac90142b6a3b8f5096c911ae4d7dbec1f0' 
  AND token = 'q7gONQVLiXf6REJIcaOoLQoiNkg/AWY/To74Z7m5xEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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