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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0cab66a3e2da1ce86e1f415feb4ef066c05afbeab59b1fb41f16b7be895a79d3' 
  AND token = '1aFl3BGoGfZRC9D6lkG939X3QYAKTwdMueiBuChrunY=' 
  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"
    }
  }
}