Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30aa7f15f939734a23a2e2e772341b1e3d015dbe82db58a47c495ceac9359886' 
  AND token = 'DHisp02MbIdc59tpqYVzwgXkpPgb9lkMvqhtdxS93tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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