Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c336b611b54ea79536176ce3f3c6108588ec4751e2efa73c5630f5771364e0b' 
  AND token = 'AuCsrhxpxkSdH42pl72krbxsEOTB4DUpH5skjvS/iyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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