Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72c33d2788e72cbdf08ebe21367ca2d441b70ff843020a4ea32121975183f38b' 
  AND token = 'qZACTn3wkkb3esT1nlNl1gGoZZcgd0nFi9pC55t3N5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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