Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93157c0045866587d0d9b408f33a1d93be3e81be600ff5fce603ab741d0d1fc3' 
  AND token = 'IenVajzKkBRL1nM9kXRr608Hrm0nB9mg2mumOoJPXSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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