Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f4c96f5305824f32b35e6703b3c4a548346e9d4db1edbcc818debd8dde7e0556' 
  AND token = '7eD9UvWEopk51aXCRgSPgWPzPPVB9Oc0AJgHy3Yrvsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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