SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5532384482896c71a32334595a9092ebf12f6c17218e1e4ded7cf819a097bb44' 
  AND token = '1Bq8Kw4wbuFQOhxvKZ6IpyPkWWYdsmQ9wzGhnhsupCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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