Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '739feb391fea9971f3bb86a39f250bb50670911c44a927e61a4ce3858e4451a3' 
  AND token = 'Ml+qP9d44F+49I4ykqyfsaFXa+VjAwhiLNDpZGbVBdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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