Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7aaa0c1c2d4be143e376696ca0b308362ae7fac322fa964cdd63d8b30ef0d903' 
  AND token = 'BWxkQ+DWWmsbpP5cQd7TgJt7YFV8QPNzTlpNS96q/Yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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