Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38560233b6d7d20bea59ad02dd49cdc338baa7611df8dac800dda6838ce2fee8' 
  AND token = 'jWYVrYUKbtSFezeZc5FC7MnGOxLS6YgEtte+z39ORP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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