Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '047df831ec735242aa3aaae100d3413c747bc937d26df081500803efab13ceac' 
  AND token = 'MzxajnAa68ineI6B8NqrHDBo2olGLtQZFwisr6cGB0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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