Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73bd81af51b42b8b899d044ae26a02d8c37b12b04f3919b38bd99a77cd286d18' 
  AND token = 'i4qH2Wmwve+EIK+mai32msuR8gpcmbDOyRsb3mNsMzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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