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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72744dcb5cf67f31cdcd01bc6ba574ecf5396757d67f83fdad5c506d6462b060' 
  AND token = 'hZLon0eBvlg1oBzs+XSsbc6p3tsSx8/pl1R4y7H47WY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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