Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff58d585b77e5705a8e4a6a50ba1f9467fca0044293abdaa45c7f342e0c9a23f' 
  AND token = 'c4Mq3JDEqfDwmdTF3CFCO/EWnWOG+/LabnXgqqAQlSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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