Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc4cc0ba6a12cf10cb09f731755fc6457ac85985f5e9b9280c7625e98f8a6ae0' 
  AND token = 'YaMu08rURYHJqlgJ4vQc779OgFbHKOD4iMrnSDmQVYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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