Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4509290dffd49d677795410fd3bd70b50eda76ba569b792c1c9187bbeeebd805' 
  AND token = 'LDsJjs5DnPor12pyrAvZFe18RDz3GXDjJyx4bWu/ZXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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