Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fdbdb3a811d4eb35f57c399f41c86214b05633b4353eb88bf77169656d5db47' 
  AND token = 'f5xnKtoZHeRGb73lnUMYztuYZYiRaFymikSfYMq++s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}