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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7626632ec367c4faf1e2f1e81daf9418bc0054d2c7fd130ac5bd212e4207b45f' 
  AND token = 'AFzm2ZEQmlxKpygXSNfF5C1cK6UE7kVwBRanxVm2PBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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