Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aafc97578dc4eb4ca74df57b61a92dabce4486c2e5b39a84c3aa63553fccec3' 
  AND token = 'Gai0ux16geZ8Pdx2S8UMQ+Ju9wMAwt8gQztLQJROk04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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