Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '266e6a4ce88a9db831585f903f59f82eae439e526b8f7f9d4b2c5f5cf9a8cb6b' 
  AND token = 'nTkE/IFtgg3LCBKGthcSpOPMnb2ngNpNT8W8bq1JVAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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