Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ca90c9258b33de809f294608f7ce801884092eac81008936f66d9536e110edd' 
  AND token = '+e7Q0B3Fa3UOAjoRBN/yr7kPxhU9huS1jqNuGe0Kz/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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