Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9da16245c9fd3a18185576d53192d5b703c0bf97f7cd617770c9c9c2cc8430b' 
  AND token = 'LMOO6D8PkTgoerXgjN+Ns3GEUAN7i+gfsA06mrHVxiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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