Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6acc69e582efda57a9a42ce3b30f9c24b747a4ef66d90d31419ba88f82b3fce' 
  AND token = 'SqCYAsCx8a8S++wPbxMEDdHuofSQD1YVrG1zH2Zq/rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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