Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ac96aac4396b3ff012c939b69fde34eb63cb070e81147590867d121067c3c7e' 
  AND token = 'AjDkb+PBg8HLSgenjCzCvlnuF8F6D6IcwGHjeDxNaug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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