Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43a51bcec6078cfda2ab9c7a74f0b2fcbf94495cb19cf0d6887d916255b50616' 
  AND token = 'hfijtoIYP4kZ1k0US1KwQyRsRQhUNMsTZEDaoxQAToY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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