Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d767b3d92239c59f12c8b9494f2a32446c5d0bbd70f5085646e8073e3cd13d2' 
  AND token = 'ZPg/8mwDgSGToq8lZRidS8qpcBcOGEGT1Xr3WEAosGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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