SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd005099de151bf4d6367fd562414aa13d01fcb642a8b174e2375f80ce5fb84e7' 
  AND token = 'WV8FtN+TTKC7l4pB1orCMXGzVtZqJQM2VidRFMRxjjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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