Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ac8fbfc410d27b4040d6462ab70e99175fae9e1280cd3b49cb32b7e435dfce4' 
  AND token = 'wY5qf5+UHzGwf5wY2StuMQYksbQmWA3W3eW5LIpux0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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