Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29fce469867dc2a33c3b7dc9d1cac37bb1ec66a768abedd571c35d3f10f0625f' 
  AND token = '1UNAXP88sN8lmqDSWKtE+KcF1R5GCDEyAGzYL0yp/8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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