Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d90a11ec46fdf9e5f0f61d0fd34d71eb0178f92240804cdb0aa5a6463a3be24' 
  AND token = 'Rkb2dL1F2Y0naOhdxS3MHEsLrFdcIfk46y3EGHKd+48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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