Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06ed759686df9b2fef0aa9a1fd0cbc8a49475c9ffce4252cf6f4e7c733c7a111' 
  AND token = 'Bq55ZR9/5jG77Nm3gnW8UkDxYgsBpbf0Mvy0CtBhtmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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