Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea8e2a3d660c072fcd446ea8846f2cb5baf74326fe8230f41b52090c485b55c3' 
  AND token = 'nywU9kvzEDLV5NJ0WMYzmiVlSQkXyDAfCxg75QzFi7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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