Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1701fc8712b6a8991a3418df37ae8c33288eefcebe8b58ff5d3902a99697736a' 
  AND token = 'eZg9ojSZeRCWn20vF+LlWI/xmFxKOuntmS8TEzFNwRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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