Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c5efb7a92f59f4f183c7d8a3ffbf0c241ef108c586762271e1b3b0070023168' 
  AND token = 'qRumBvOmkmWO4laHDavtE98ampA7kfSMTOEQmQbGfH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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