Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '241637ad75c31405e2ebcb7986b2d5caf65ecd0f35e13849f0efb3c687606723' 
  AND token = 'OvwWms8MWb+D9wqmhC6Be/mwvg2sWIJinE+AuESn6Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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