Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '34936ec7e78914995c05976d154aad1e049691598b5f84829199b83ed06fa5de' 
  AND token = 'OEL3CP6zFSEVA/XGFadwOSaBK0sCWOtKN1OfKv/myEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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