Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b2d3b6d7470b69e3f4f0317fbab95946eb0d7b514ee199e09a48156ab60903cf' 
  AND token = 'bdGT9MgMx99mzXD/kv2shgi/hC8kNJj9HlRiytz3u+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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