Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '947bdd288c8688351dd84a83316fdbe1fb6257dd4bdfabd7fcb8476779aa0366' 
  AND token = 'xfpTgHFY44BILFsPvqXsLMRDpmEYC2tcKs4nIkp6EHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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