Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e45efbf1fbecee0f5631ff5ad670079d8afc5537d2b74bb12274d0c0f4f3322' 
  AND token = 'LMluVdDzyacXEDO6g/jAUAYEfWsM7GN8Z9ekizJd0SM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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