Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72558304601cfd4b451e8970408b756c714ade345bc5fbd5ae12fd656e33e7c6' 
  AND token = '7zlWuviISKjpctUo7MChkK5+mT8JcmapU78lYXGC2Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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