Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1250fcaecfc20235811a6ef0831213e28fc27a78403f79475b8d140467b2f2d0' 
  AND token = 'ZUc2mD7BsmbXzTdChsPeXiGAX4+Nkb8nq/wcn5Wq9KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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