Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dff11692882e38addc3e1a032799e5cd6a62f094f44500906115b89a99bdf4ca' 
  AND token = 'yuDIFbAycubDnrpzus6oERbRZ9UOOENS/CCqJHZQgyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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