SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd83ba7c3daf2c3b3d015ef70c21aa0797ff2c219a25494175db163f36cdece43' 
  AND token = 'ZpjQJc26YDWqg5qXi+Ai+S/A0dVrTipOnLN/2wGG4nw=' 
  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"
    }
  }
}