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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '011661d7be31b40d62a69cd381d58b476fc6348bc9ef875c217622e6be6c48dd' 
  AND token = 'WO8e3cHLpXkVGvFcSKzn2tq+2q0DTHYvyz8W7J9tErc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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