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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '74e40a09b2acc80ba707c4bc441e276fbad435b27ea5ce908e63b14fb3362a58' 
  AND token = '1rmGZCjP7VlGVdEx4c4gxRgEepoLzziMsORndtur/ow=' 
  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"
    }
  }
}