SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cb821a607c97ce797461ab10171e8d68f8372131a0d3eb381eba64f63497c3a' 
  AND token = 'rGV8I9YROIGjnfC8+4q42Uz3U6ZK006ki9wXvUXuZ5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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