Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7feafde122f4ba1a079886492a8e1af80dd46a76438a1ded9af2aa858bb09d3' 
  AND token = 'HwMdfH/QDTLSuf4Ok6Uh4xjUlaIthWinOecL6xE+os8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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