Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a96cd4c2fc321d216350532051d14d8655a8e456f3b09ddeff833bc15b80f53' 
  AND token = 'Gu9Ub26G+Xooi35ElwjnvU6Qj8R+gI/zPNf07CG7QSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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