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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8810f9d9de74000f9e1794a4b2b2e64013ceb539994b6ce93693971a42599be0' 
  AND token = 'vY7CZKcnYVJt5yyTPXy8Lr4YOnp1quM6IxoWjJbqo7c=' 
  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"
    }
  }
}