Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '551ad58f7fc07a1b8a1d63021b2361469ae547386a1668ee6dd1344f51fea03f' 
  AND token = 'Terk+p6K9YuWwM4gBaDHAo1XnTJzfZk9RyGZdyVvdRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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