Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '678686c544d94213237eda9ee1f7bfdaf1f2a049468c343eac9ce89f9ede2648' 
  AND token = 'Jxo25MJmZBmPSyN4jX3u1xTGMvH+xJJWnRtU95DfM/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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