Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '670e9084b28c13c283e95f2eb3ca52500294ff1424964be565bd5e2b9c79487e' 
  AND token = 'KVH5GueY5k4fsKlrGmt+Ow2VMqLC652fxVKoGTfieNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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