Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d1cb5d3b4c6dd13ec2228f5d95374334dcfb6037bb1ba10b5d0f5471dbc77c9' 
  AND token = '3HwT1/883SDXyCQoAGCYi1xcu/Tr4aagFnL0cbkpu4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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