Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1665200edd4d5bb7b64bc9d2b036bbfb417f4d0b98addbf2c4a19b5d1ca08cb5' 
  AND token = 'nwo7rMVSXeUg2V51LClEEf2mKjrBgBjT/TkEUHluy3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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