Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3c8517a56dbf27f8b007bf36385abf305e14b122892f5157efbf8d3830a05fbd' 
  AND token = 'F/Tjqn3KGJVatXnt67bTUYlpyHz5u1tq0QcNTmLjz0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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