SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e13bd5e95c587accef37897b950a846d6cc61508d72f1347dc63502cbe54bd7e' 
  AND token = 'GDMBVbtqHY/ogJpYIH/sRZzLtU17mZkgYuXmxeHhEdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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