Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9d3fdf9919959ff4dfe9b6584f0c8a77fd7e0894848e4d6f44bc632309ed7d8' 
  AND token = 'FBwHjXYq+7lRoYnH134HRamiLrHF6cmIWPIypPxsH0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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