Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '98b9a2ea49ea4e285505e90cd3b4bf7b1e57bcec37e7d547a2830d9f842a5694' 
  AND token = '8sVsBELMO+hIpQL5hFJuJtgxwTagSnbHufcdan7iwms=' 
  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"
    }
  }
}