Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2a4ca03c2918ba7835b3c7828045208c539de831f7e1de19197bead16e3bf850' 
  AND token = '9MrWVZu5dunfbeqPzBWKDEKE7IOslomfHaAwhonyBIM=' 
  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"
    }
  }
}