Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f1918532bcbf4df18189f531e11b21b249af01bca6686387839eb8fef91d784' 
  AND token = 'tRC6aXPZGYLvtGAF38SZJQezas0Z1Kmc2w0jK2eLWtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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