Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d8db2c10b420f3a4703152f8a239472d6a3aa463941394f3016f4bebc7de643' 
  AND token = 'aVtZ1ujvF33MU9QWRs4Rn4POlaYxADJ8ImVM2l8hikc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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