Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fad1baf74a6e3d5a8fe4913988842b79c64a91acef333d933c278cc1ce7be367' 
  AND token = 'tquvm1BdvXddlQlBNRo8AShz665tEV46MGLkovfqV4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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