Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6541646f966b1dd372a30aaa120c916da10079c7d70e045770494223b2072945' 
  AND token = 'NU8sl8BeFlyxHmh+3VygLQSs0RyAaZH0FmoiQg/549Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}