Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc4edd054efd39262afcd9f4756478b32a18092b2880409f9131c1f26fbe4f8a' 
  AND token = 'j4TFjbX49dU/z4AB/rE9G5JsN7EMMxBSHYijeEWr1UE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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