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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9f670228bacf96ddf39c117d9cb1c4e650b1eaafb03cbf72e490022b80e5d852' 
  AND token = 'Kah2LTNOFcFx8q9H9RG6C9hN00tJ0TlKOliWlibS8rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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