Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a56c7cc77a98623ba6223d35d82e3e1226e342ad63d64c5d75dfae237583b30' 
  AND token = 'ncd1Kgvh43OrBWhjvvW/ws1qrSI50s4xGdkaVc5vdbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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