Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7144d9c0be445bce9d27cde3f2c77f2b97db4cb1bd829a49947e2504ddea07bd' 
  AND token = 'nBS/R1afYir4ccgoRe9dMDzD364Ug/lNllAqj77v6xE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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