Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5b449dcd0ec5dd1e7d85ad6e7e6cb4c9e27db9c154d98cdcf9c05c58b5f8542' 
  AND token = 'Vi8ZzcDdBs3q6wKOTrPxH0uhgBizlWpVeCrRMWxD5FQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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