Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83100ca9b2839b30d7fc3975e4f072912cb7e3d35ceea5f715050de16a348684' 
  AND token = 'oaL4DrtyDvJuzyO8eJamJPPNjEompk8I7HgQ8EBWatM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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