Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29c5cb1cbc9a1bb6ec0b9f29fc33b85cb7f18114906381285c93a43a132c10f2' 
  AND token = 'p+ffnqFaTXMV7oQBkAm6XiAxJlsVOAk5wEd8ZBrjUb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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