Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79e3287a9ef6892a14712522789a3d04988adb96e025e86168f478d502bbf898' 
  AND token = 'chy6R51TCjzTIyaC21QkenbNkyBz2a4GuhHAm6II1pU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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