Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fe0679ab57fc18a2c92376dcf0894bed0518437c52faf11a3fa595a8030a079' 
  AND token = 'NA0fY1brx1CH3uz3EJovZ0h006yio/LkUEFH2wAS5bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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