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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd380262d1fc6ba8b41e0f210835076536b0ecd1a34d6cb537ca969d940f99369' 
  AND token = 'd1STI0EcgogK0Kvge2hyc0clvqYecLI92U/XEgqNc7A=' 
  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"
    }
  }
}