Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '166d43dacd9579d466adbac84288aacb055f2c082107292a85a5854ed014d227' 
  AND token = 'vJVZTE8zzBypEuGPRG4b19vjyeHXOLzGLk0lifE7pnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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