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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8b036fc0fe8418110b7e06950ef411680421d696f42d9b95c43add5c3376a47c' 
  AND token = 'WaqagKEZUyWUI6WqcXJON1AYYTdDC9hVIIUm0oJImJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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