Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0df709579905f44c98761796fb5491abe524e17ca87b00387ecaa4858c9179cc' 
  AND token = 'TBMlHBLQ5O5LDY+zBni3WnYC9jdb6EO+aTZEx/jKT68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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