Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd339a1606f2ad7a06ee41e6c8fe910347df7a15070d9c0709114c75143412725' 
  AND token = 'RUXeKueIrQYzPzsotSGUqj/Cbzd0yKPmpfxwxPTWn5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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