Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ec3795650e64eb745a7d5984618b2d1cd530951bf6b23db50f8eea8c3dafc1df' 
  AND token = 'm3ORR/gXxp2ptzsXcPHGl835ny1ts639l7Mzt4m5NwI=' 
  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"
    }
  }
}