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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ad42b058cb5df35a8856e05c318cadfd4f3429b87f666064db4b7aff07ac5b77' 
  AND token = 'G9ZWqmfDMU+D0AmPP+41i4esXr2sAqjf+5bUOjB4uZw=' 
  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"
    }
  }
}