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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1f4db7fd3e5554618bd00ca01004ddfe371dac70c2b52a1d9757119fe3059b73' 
  AND token = '9kvC9hOXG3G9crCm6z6uRhEz1PM1W9c+fOuSU8qvP9U=' 
  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"
    }
  }
}