Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a56ce9cca211cc50c204959692db3bb58fab84b839a927f0faa7bac99d412a86' 
  AND token = 'ew2DizKqTxfO6aE6roQNt4YQ5vw8yBtOnGZbfmp3by8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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