Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3200656fad99b67412ea15315297865333bca16a8e8d607213c3ef63d2540576' 
  AND token = 'I2oYekBSA5tsK6qxEYqXkkvJvrcMHh+bnu1xp59+ltY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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