SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a130a96a25f367f9e8f6048ff9e1be500ac39e59552a6326becb175f6f832e76' 
  AND token = 'kUrhGj3uPK+sLplUnhgqGg/4s7NFU5vqILjMF9A8wpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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