Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7ea033e81357e685cca441923eba7b35d8f38c48015ebc757b3b293cf72a0af' 
  AND token = 'akJ8HCJOms8cGQpRrWeyYs7WxmhJIt4tRkiyZ90ukZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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