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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d0b5407b6973f1ceb7486bc31a614b9a91eb917b4fba36136e0c3d789ee25dc' 
  AND token = 'V4CWucfSFKNkeylvSBJtYmkgWli0PbjdVq5WdqtiLYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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