Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb9342ec5fba0e97dde143f74feda100a5cdca5cf90f98b7aa9def9761795d1b' 
  AND token = 'mFBDud6JfVh4qWlwBW2v2m3iTtCsfelQNJrokIIIHzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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