Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '441e8e2ac6047d6d0ed4bd813903f194d5cf327b131e14b9a6d5ef8426fec7e9' 
  AND token = 'ab7XPvwwgHYAPdz9CpaIF19ZokKdIp69OLsoYy8/l7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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