Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b81be1cf190f1aa367af4dc47d703fc618ab0c381295d3e90f05ce8a564a3105' 
  AND token = 'Zfy0nQjQXjImjJqx/anF/hd8tzBzWUr2d6dU/0Teya4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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