Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c48e7277a45d99c8dc85f333ee4f7eaf6f5ced0336f300da3bc901d0de7272' 
  AND token = '6xV5zUV3qYuelFC6g6AmQKOBymDm95iQc7T+3FSAsVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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