Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c208f98bdf22b5e1af3c845218c826f1ab028d99c41fcc9b37b2e916f21ac11' 
  AND token = 'bwMUDd9xImPOogsSeKiJZgUzge5d49jGYt5fG2rivB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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