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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd539aca360b43c6f484b2d8b3dae650b2ec45fe3d2934b182a33d087477b9662' 
  AND token = 'K1PXzE8LPx1LFIQD7fcK+daI5cO0XOAUD9KLZxKj7tU=' 
  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"
    }
  }
}