Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ea64e02c17b1f8a8d93917e6c43d14e3e49454cfff2d203e44440323c0bf60d' 
  AND token = 'LTPUnJfZLIunlAhgiqOD3rdaYTZSYmzPmn/Dzt6HNiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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