SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad236527815b4ea509041e57872d0b2176a480d68ad00ae5769f31c65145e8b9' 
  AND token = '7KTGTCVauQoHGvVXzcW7/jA4wd1qwgg1U3Jgxnef3fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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