Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88fb7aa014229229511710fe6a906d04193ab8126cf0cd165827d75e1c85c8ad' 
  AND token = 'QiNy8GHkQ1/kfKcyzi1XY0PFFnc49tJln+U/OjFqERA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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