Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f48662caa3135132fc1491f51f19e640747159602d18fe17da97edaf5010e363' 
  AND token = '9NTHwzWO7WIK0ByZg9TRK99ELPQ0NgPuYES+9cmJHxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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