Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '779ba3cb4721b8c1b5684b1f7f3c4680572a818f58e26c580ab3bff45506cf2e' 
  AND token = 'rFHUfvQz75zaQ4yx7f1BOqsgLOiFoJSZVr3pAisJGgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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