SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '130ce1228be990266d68fe014dcb9e55b309b2d027e4d19a6faac80a29c85c24' 
  AND token = 'dYa3XxqiCPoUzVJTEKXtQjCT8Kg0UdJnv4MF0W+YkOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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