SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '973c468f73345476c2b599cdf21a6b4792dc3c937a425bcfed6ea8565739ad26' 
  AND token = 'nlUIoLhyBTzcvg0z3yq5QYzCXw8xmRfjlGtC6L92Bq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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