Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b9a841666a609085056c14cd4836ff9707e272c6fa57d4a2de05025e2f4d520' 
  AND token = 'SQQYxl8n/R9r7zuSzEVvn53iUVeMwcxJCgVFEzz0J/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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