Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44ea08b4581e5abc2a1b68ff6dd726fa041afa924b68ada99161ca800be31a09' 
  AND token = 'DAKt6cOwnD2IcdHn4T59Aow1w0lwRoPeRmiWfVs7Gjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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