Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd797ea62f4bd4f7982f89b1bd4c18d8c1e35a3c5badbfc5f4e69a562175fefff' 
  AND token = 'E5KnBDyjl30S+rkJw9HpSdwOYOHSCG9kG8ODsOK6B10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}