Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2fd28fde7b182fdc522317bdda1d3b363a9dd3886c4ccca4253e1f635ae3b7' 
  AND token = '/WbXsbY2B78wk8tBTJJVFHJYavN6gpbZt0MoJ8dhlrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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