Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2752d278fedc8669941f19124fdabf2316579264c465874305fc87d5e8d86932' 
  AND token = 'TzXcA3vb2TGoJchcfS6Hnio1v0fA+y60WIpWBGzRKH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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