SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7bd84d1940e4fdf60d34b8357168d8fce508d20bca87e14e418a81bb63ce9912' 
  AND token = 'eZVu/zICJeyYX+IZJNWFL1WXdG7pBnwDE2hkldk6n9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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