Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3587573796a9d35da739b7ffdebc0fa65cddc147da31a3e0270a3714e713f419' 
  AND token = 'aPlgnOf12Hk0XA1+vzknkI12gHsXjufrqyoQZp+aGyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}