Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '154cb71d1425384e3c4a8a4205d23b921a8f96a539f433897aec0575d7a2c5ba' 
  AND token = 'kGcLyxygnSWmnfAXJL7kSuq4y/41+uytdzBzjnPGXWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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