Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30edaa48ea8c9db9c53b2d479085770c756a1de396180fafcca51916a918e5f9' 
  AND token = 'AcJ5sJIAidZkhD5Fql3l9nJUvEsDu81JxHFQaI145jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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