Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eac26af1651daa32bcce245722139141cefa4998cad8662667f03313aa4281c' 
  AND token = 'Cl1/TvIt3OXY+D2j2dzMkMU3H8ScR+kHgJUHG5GNPnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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