Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9967d43a7b5e5d6420c854aa3f70922fd12969042244b2ef49ce90e6f024ac47' 
  AND token = 'MpencV0YyV3u9n8GH/0yGXwHmQlFzuFMAI8km7otzMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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