Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cc03b13e9591fc34e2c450bb477f09848902f2ad8ef7dfe2c4326be6bc69cbc' 
  AND token = 'lXCeZ/FWXFL2Jp8MXRdahbGrLHZCtuj/hsoGNLLubA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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