Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3414e81617fd70c9251e37418c1d4c63d7d3b304ec850473621d5b71d95b379a' 
  AND token = 'ER5buQfJLEklac6GXiouLsoXFcMgmTWqixjtXoys96w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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