Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86499029d221507f1e3883edd5f769029131dbd762f29e1946e140263f92e65d' 
  AND token = '1aZ37jLbddTdWf/UJkcf2+omUhtGLqXn6+aSyTIk5fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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