Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92e75a07e98c39c7a5fd266ee8065903878ce93da031d8d87ffe641f61cea157' 
  AND token = 'uFZ5OCoCfC5sMtMeNjD4TEHPl702saHCguFboG1w8tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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