Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '783788de765c362a3491503b8d8bda024313145e2f2886a6cf7d0cd60fbced00' 
  AND token = 's7Am2XouGZAaNviiqeO0KUUGyc/j8PyKP3SPkcEAjoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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