Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1a4ee58c0919d02cbee0dbbfde6b2bcbdb683613f6ae5d2f1d741e4de73aa0a' 
  AND token = 'UKehQPpBJYSj74nEWNwEIj6w0mtW0SGEyLBqLJjXsYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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