Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '288002e4818c506e6118257657a4b117cec47ce35c403e30a703179d06433be8' 
  AND token = 'LbTf4Fo+jrAY1pIANhsKPV/frPAacESKqrDGgbj+qUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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