SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6610cd43fa1e9a7f229f507c267719a4f0d002bf60bb63a164ff9d9825e788fb' 
  AND token = '/xAwVvBl08Ro2zwtX5twDJ5b+DzY4nl4ZSgEH3ZIaBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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