Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb42c2f01f0caa654e2ef012098aadee5c3b08ad4749393a33a26e922d2db4ab' 
  AND token = 'XHLqxgDF30zRe49DzHA73AQGBqx5VMIT+FzPPE+Oe0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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