Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '037bc163e7010d972213f43a814b5a461d7f46c2536b718724bd190cc6993b1a' 
  AND token = '8PLUGmLiw47nFAS3B4CYIlYZbUIGYA3UMkBt1IA+dT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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