Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ba2d7fc335b9f570c3a6183b1ab8f785ef88565013f80cd032d88c731323b91' 
  AND token = 'MWk0gKfR4rVKsUj9cx9JtcA2UvM3jyvPh2VNM/hPWWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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