Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e3388fe361cda0cb247a3312a71630a3306557dadf86b35e61f0f17603cf058' 
  AND token = 'wrby2kuqm7yUGarku90jHmXoZcuZo1RhcrZjMtQSWOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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