Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb28e5b08b20370d2bf485f2b15c91bfd465d8293f280c71ba9b843ea192b5b9' 
  AND token = 'HW3WG6BBAiNtsb4m8nHyutLf0aks//4/4+fIMXDkjsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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