Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecb94ebe1d446a4072d62cc87af9c61dc8dd17cce3b942838850cc6e22de2172' 
  AND token = 'Qx2BYn5rIadqFLRniitP/nxbiCWmB0DB3KAwsK74Omc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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