Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c636864d5e4c6a76e60631d6761d57c620b0b7564652a30b6b89ff08e6a7f2bc' 
  AND token = 'qL3WGHyI+GpCla+NaKK8PCZSkuIjXrpA8ep7R24WT2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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