Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '746f36c6fc07e1c20bf07f31d9f4c9ca6b3e9e541e32c40066e91856967ee189' 
  AND token = 'L8fMZBHlDZuZWbYrc3HZNHQ9m2RW9QxINMB+3Ckjsas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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