SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '46f69c1f601d5b1c88305b5fe781883bf082670bf755f41a4ae1e801f3204bb7' 
  AND token = 'yTT+VRVp7m6f3w+zzQBle2/NMd0x6tGavZ2K3OYh5RQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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