Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a391ab56c1111acb2d87c6bbb80b14ea6b005642e2d54b252f17a24acf07a65e' 
  AND token = 'k37Fn/3oYGHGJQlKiUg/i68QFh+lNsWfj3DleMYIslo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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