SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '195d753244e2a1566f374f2b1568732bbcc47f3ded64ef03b3bce51dc1a6e6ab' 
  AND token = 'n5z5HV9YSwTO/ZLYZZ0RokQCEdzjLA9Os5BvKvGBFzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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