Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b43ce7205c406d588d56ab1dcd2573348f11544e490a570e59a0d6e6d22ebeb' 
  AND token = 'JxoCj8C7MNmNuam1nBYBZB1/1fYYbY+QxNhj2VYeJW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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