Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd4320ec8d4c0c912220fc8b2567219a5ad05d423378d04f849fb770ef7647e5' 
  AND token = 'z1/vSH9zy0hNfLtMe+PtZov8lyR6ISKH5gV3uo6MB7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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