Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70c35be6b73e621e1cef1a55fc81c8196bc7a88e49ecd0347d6236d124d90470' 
  AND token = 'zJRbNFidnDfJ1Mnd2NhERSOd3K1ZCYTRzMV55FzUfHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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