Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9494ec238b8e483b925b048cd6c65a039a87f5fbcc5e5d1d89b45946008d4703' 
  AND token = 'PvkXuwspkV77jh6JnWHe8XwqbJLYbaiqaNOTMMO3ap4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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