Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ecf7272b218f353c61b77766be737fc7096e8352d2d13789234a43b9a4321e4' 
  AND token = '/UPT4eNbU50xlizymHL9u9y4gQQWA1SwEPJTA5xFRe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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