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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3b489c8401a6a9e156bf7454e02da76fdaad0d4e12f0279c40cf1cc49a03600e' 
  AND token = 'yknZtUgOz7iLoSu803sTRdp56fh8YVmK9qRjN0D1WCM=' 
  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"
    }
  }
}