Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2712803e0ff23b6a1dded4312c6fb8412307fb41679e2b424061f60e514309bf' 
  AND token = 'YeXsl2yulpjF2M2WlAYnRWAKrVpJV2PBLhPsdqlbb2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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