Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57382f544aec4e9441b34b839b91f945fa787967fc6898d99bed9c8d9829a39b' 
  AND token = 'rmoZ6AqKX/rEziY9kXK47OnPEJwJ1k0eWLZsNH+IzSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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