Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe30b1212ed17aa2d16ae8cc5c070a88592d2e6bd249afe4eec55efc98d9a3a2' 
  AND token = 'FsIJoX3H8paxBoVJsowVIHKUPGwa2KQhny0nhvFaFPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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