Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26ba0736b8d938298e0ef5624c403d1fed6e6346bbb97e948d9f5852386eefa8' 
  AND token = 'JpasuhhXeTf87CtB05zfMdLyTrMr0z2T64XqwYjo+yE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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