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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '830c0bd373ff17c2f3eddd20b08f0d5305b3d70f509f2f17e879e6bb214e4d9b' 
  AND token = 'WG7vSOYA0nVSdCLsuvxPlR/f3l2sTBgyxJCXTOnanFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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