Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '287e1936be8530ae5fe797361c35c062841c4c817c1bc66f98c1b7a122c3a2b0' 
  AND token = 'KhhqNLiskn2TIHx1RaR5mgpqG21woRVudPUi9ORK9XU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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