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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2a68a82baa13dfa651e3f69f31f2e9c44cbeed2f83a4b9a8c8acfc6bccab8a1b' 
  AND token = 'ROI/Xz5DgarLeeQ70sNCkW2Ub1JmrIax2e4dSzPzwWQ=' 
  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"
    }
  }
}