Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4a33212dbcc4dd901238cf312b00eba8f718da688332bd5b0680bd1ea9de152' 
  AND token = '6vK/sk7im3qw3XRSEn8wany9RMh1x8xYVafmua5Wo7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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