Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c71d331b0c08a723831a234c65cab989873ad8d4c9b0ae7dcd432da845cdeacc' 
  AND token = 'suXqBLwh8skucZIc5OFliMI6jBkSz/k9UN+ypaSFjOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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