Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67fec00d98e9f71d0abc8e6535286bda838c851d12ab3c7c089473e0a891ccfe' 
  AND token = '85OfoujgDz0rUUo5nQ/5IAua0VnmisE5Np1nJ2tuRws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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