Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c53d48a153d84f6c29ce80583b190ea65c5a09e1eb07c73d8477c312922b58e4' 
  AND token = 'ucOfK7FdJ+ctT4849SlTVHs3J8hmbYwiaTPPvMuypno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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