Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a3a65291229621aec9b6d833599a2b753c755e7c0a4e58bb02075ec3d218b70' 
  AND token = 'oynZMklNk2gCJHl0zCl9ykDaM6U14w9Qyq23CAz9758=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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