Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6704d39d9e8b611a56a7d28e33babaac3be16d46190e1d4c8823773f43980416' 
  AND token = 'RAJ5xm8TMpPl369LBSKOPaS0BHJmQjaj0JLGGtAhoFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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