Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '728a86b207f5861a6974df472f88769b931d263629a500a3756486788e3f98a8' 
  AND token = 'ZXOc7a/QmNxQEGNH45HdtFIFwsez+4Mh0KXAhoSKVHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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