Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9206a1226ce4f5e454fe167924e7cc07d03296f00fb9ac05e538b2eaca539d5' 
  AND token = 'UsmAon9J1ju/tfpmoeHuTeYCQfdU7k0r+vBiJZs8jA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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