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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801bcc605df47a79e031ced31b0641b4ed18549b843407b06b32deb49e821445' 
  AND token = 'BYDq0WuCYX4N7ZgtRvI+hHqVrc6D4VUiNZzMCwDckY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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