Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c90d91f80f4c34f10ee2f312e86b92c58317747b7e1963c8869925070a65713d' 
  AND token = 'EHxIyhoODPmf5nkLYLspkrOdI6zATmzMUqn78YBd2ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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