Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab73cff5a3ba7a2186b852653da3c13b1b7f09436dea57ae376fee1f9e58d487' 
  AND token = 'QQYBsHGmhi+SrDaRt04wj40LyeZDxD+oriZPUXymrx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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