SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72f2c030c76454b394242ab98af4ccae361d5a29e575f3d180f3bbbb02879414' 
  AND token = 'AjAv+mkN7I267YSkKb3Fnt/AYSEy5zhVlCp5FJ9Ulbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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