SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85b1485338e8bb50421c183d843b3f85d9821ef2d6e8647a26179904d7c79b44' 
  AND token = 'jWyHhK4dxpgTfNJk/hN8bFlMvPOvM6G/pu9KakIjV+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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