Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad4c7dd07e1852e99a83006068d29bef7f9b1915313187c565e5314a10c301a9' 
  AND token = 'Bz/3aVDQh1vQdtFrHp1fqGUfPcePl1bnm66WPYRL7IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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