Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cdd9a4b587696dc8044703c1a92b7ac1746c8473cc46a5d92f604c9f6ea1213' 
  AND token = 'McpOlj6IQwTfzwltD0DdoRQBGqYKGR4FtyqUbAkd/0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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