Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a58b722aa6eb9c388764b77bd7978311fa3e287ddbaf1ddc4e10a04f96e3a3da' 
  AND token = 'RIBRTOP/za+c5RlEGGDVw9yodrBmKJ3vTnXvbIriax8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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