Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a65d2414272a4eb121ae702a553df5f54dd8fc3f384dc09673a23e407afb512d' 
  AND token = '4geW0ibX9esRVBRQV4BpZYnUIl/loEoBWUZA5XLnEBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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