Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4cf99c00ea865c76b6bf95d38f07fbfdf5f80a5f2acb24efed4cd076f933abf' 
  AND token = 'zQ95Rzav3j8aqixauSZHNyj89sa+H1uNS/RZiSjwlJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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