SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd2a5aab575a6b7fd561f0ec8630b9f6b53a486c22e65b9d74899cae5550b2090' 
  AND token = '5/l+WnB/9ZLxlj+xGydqlOq9rDRcoUAQzI0UCXImohw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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