Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e503f73262347fd364a4af3add6ada43e748a486468b97ae50f7b717a2877a2' 
  AND token = 'A+AHEhyaGdjjq4nF9rDSm9zwMy04W+EWKaUeB9Hje0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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