Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35691564433b70127ce5cd1a2d874cd944efeb1c1a11645e7888529606cfc3ca' 
  AND token = 'iNa+achOCGAJliVyIfDeXpCptZ/IqI9E66XDqELMpvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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