Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e38aaa75b1453a6fc9b92b6bb2af34e82bed7547a38f1a80cc1f26ba85a3d5e' 
  AND token = 'rE5Jhy5CfPxomuNuY1pK6ia0S39VKr54oi46CrPfe2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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