Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6904a27d4f68da8422ebc4da86c894540f8ca527c05cf8f952901d7dff9622fe' 
  AND token = 'FE3Py7jzcKF0SC+e96zq4VaBSyZVF4Eui440hTFzLwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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