Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066f4f9d37c5ef80c1091b46786a3f35d8efacd14c9da9a4dce0cd856f3bff93' 
  AND token = 'b086xAe4t1lUBtLoPx8DqSoNr4ytreBQYADzMTudDO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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