Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '137e38f484db0448d76430f3d93b3be6e75319e93a155ce8fba3c715677c83bd' 
  AND token = 'D8f9HpqGUgn8jpn3/kvnAlVFNefaP4vJsdnT/I3jqJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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