Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '837a0b34bf4ee5b9a49b7da47c1ee70f6e471ccffb927835df845dc7aee4fee7' 
  AND token = 'qlMF3iMhux2FqlRUZCEfr4Bajsycx8e1kJiAr+2JocU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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