Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51670d0c8c41d7594204f0685178a9876d33b637ced3279de87802e8c2227780' 
  AND token = 'NIaE4PegeiWpqn2/kJLR53ruEqjhdnzzMPkOugWOWec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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