Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7813719514c8af014a87df23bd2e1b13532838b0adec529f0246e736d70683a7' 
  AND token = '/epiGuBgY4yLu17QF1rDwDfyw3fqTPfAiRbBEH8e/M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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