Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a47f0f242afd3677f1ecb6a161cc274173db7ca11e96c268acac545f35de4a2e' 
  AND token = '707/qxhpzll3c1ER9DEdBZBTa/kyq3iUMaq5UZfNmLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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