Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5d4d017835c38c6a616e2054ace5d8da669ea6bd6c4c02e11bcd89f544c71e84' 
  AND token = 'I72Apwh7Koyph+ekndqZjNK7eboHVei9409/JqJU5cY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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