Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '64595e6e9b47c90a9bc3496809d393aed4ac351c5c0fa762976d1772ef225f6d' 
  AND token = 'kMXPrJeXBxWid9hrNy6UQRBoRuk4+pPFSFOcsfn1vM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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