Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '544cf459f449dbc175500c34aeacedc978f0eea95c139e5ac3dc9e3aa35cf24e' 
  AND token = 'QjKRx3VhgOrUE5zt22c4Z2EZDDa4MPIcvovITZiXSf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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