Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15f6325e6886586f5c046ad3d0cbf5931c3ff118e8acb00c446c8c9fb9bd03fa' 
  AND token = 'AEmorDz0R8A6cNhi8aGnPRuzMbK9JjGuBfljscfyOMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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