Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd625dc11511ba70f81c60997e9ff77366aa824b6efb080f659d022540f7a6fa' 
  AND token = 'nOD0n4QjcoJOwfWBmM5EQJh7cFIqTGQjOYO5O/DYWuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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